July 12, 1913

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Features

Panama Canal Architecture, A Suggestion for Suburban Traffic and more

The Arches of Mexico

Relics of Early Spanish Engineering

By Mary Worrall Hudson

Battleship Drill Indoors

How New York Trains Her Naval Militia

The Reflector--The Telescope of the Future

Why the Large Refractor Must Give Way to Mirrors

By Edward Arthur Fath

Carrier Pigeons in the French Army

By Lucien Fournier

Curious Resemblances in Nature

By Harold Bastin

A Clock That Speaks the Time of Day

By W. R. I.

A Mercury Interruptor

By George F. Worts

A Seconds Pendulum

By C. C. Kiplinger

German Inventors and Office Furniture, The International Cone of Zoology

The Industrial Need of Technically Trained Men--V

A Variety of Avenues Open to the Young Man of To-day

By A. B. Quincy

Departments

Letters

Correspondence - July 12, 1913

Recommended

New Books, Etc. - July 12, 1913

Departments

Inventions New and Interesting - July 12, 1913

Recently Patented Inventions - July 12, 1913

Notes and Queries - July 12, 1913

Purchase To Read More

Digital Issue ?Read or download this issue’s articles online. *A printed copy of this issue is not included. $7.99

Print + Digital All Access Subscription ?Read or download this issue’s articles online. Plus, subscribe to get Print, Online and Tablet access to the next 12 new issues to be released as well as Online access to archives back to 1845. $99.00

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